package me.qingy.shiro;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import me.qingy.core.entity.Menu;
import me.qingy.core.entity.User;
import me.qingy.core.service.MenuService;
import me.qingy.shiro.service.RegisterService;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authz.annotation.RequiresPermissions;
import org.apache.shiro.authz.annotation.RequiresRoles;
import org.apache.shiro.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.List;

/**
 * @author qingy
 * @since 2021-04-21
 */
@Controller
public class ShiroController {

    @Autowired
    private RegisterService registerService;

    @Autowired
    private MenuService menuService;

    @PostMapping("login")
    public String login(@RequestParam("loginName") String loginName,
                        @RequestParam("password") String password,
                        @RequestParam(value = "rememberMe", required = false) Boolean rememberMe) {
        if (rememberMe == null) {
            rememberMe = false;
        }
        UsernamePasswordToken token = new UsernamePasswordToken(loginName, password, rememberMe);
        Subject subject = SecurityUtils.getSubject();
        subject.login(token);
        return "redirect:http://localhost/index";
    }

    @PostMapping("register")
    public String login(User user) {
        registerService.register(user);
        return "login";
    }

    @GetMapping("index")
    public String index(Model model){
        List<Menu> menus = menuService.list();
        model.addAttribute("menus", menus);
        return "index" ;
    }

    @RequiresPermissions("system:user:*")
//    @RequiresRoles("temp")
    @GetMapping("/system/user")
    @ResponseBody
    public String user(){
        return "<h1>允许访问<h1>";
    }

    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @GetMapping(value = "/captchaImage")
    public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response) {
        ServletOutputStream out = null;
        try {
            HttpSession session = request.getSession();
            response.setDateHeader("Expires", 0);
            response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
            response.addHeader("Cache-Control", "post-check=0, pre-check=0");
            response.setHeader("Pragma", "no-cache");
            response.setContentType("image/jpeg");

            String type = request.getParameter("type");
            String capStr = null;
            String code = null;
            BufferedImage bi = null;
            if ("math".equals(type)) {
                String capText = captchaProducerMath.createText();
                capStr = capText.substring(0, capText.lastIndexOf("@"));
                code = capText.substring(capText.lastIndexOf("@") + 1);
                bi = captchaProducerMath.createImage(capStr);
            } else if ("char".equals(type)) {
                capStr = code = captchaProducer.createText();
                bi = captchaProducer.createImage(capStr);
            }
            session.setAttribute(Constants.KAPTCHA_SESSION_KEY, code);
            out = response.getOutputStream();
            ImageIO.write(bi, "jpg", out);
            out.flush();

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

}
